Description
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication.
Published: 2026-10-01
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

n8n versions prior to 1.123.80, 2.39.6, and 2.40.1 contain a validation bypass in the community package installation handler for queue mode deployments. An attacker with write access to Redis can bypass name validation, permission checks, checksum verification, and npm safety checks, enabling the installation of arbitrary npm packages on all cluster instances. This flaw permits attackers to execute arbitrary code with the privileges of the n8n process across the entire cluster, jeopardizing confidentiality, integrity, and availability.

Affected Systems

The vulnerability affects the n8n application from n8n-io. Specifically, all releases before version 1.123.80, before 2.39.6, and before 2.40.1 are susceptible.

Risk and Exploitability

The flaw carries a CVSS score of 7.5 and is not listed in CISA KEV. Exploit probability is unknown due to lack of EPSS data. Attackers must have write access to the Redis instance used by the cluster; from that position they can install arbitrary packages without authentication, leading to remote code execution across all nodes.

Generated by OpenCVE AI on October 1, 2026 at 14:10 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update n8n to version 1.123.80 or later, or to 2.39.6 or 2.40.1 or later, to apply the vendor patch that restores proper validation.
  • Restrict write access to the Redis instance, ensuring only trusted processes can modify queue data. If possible, move Redis to a dedicated, secured network segment.
  • Configure community package installation restrictions or disable the community package installation feature for queue mode deployments until a patch is applied.

Generated by OpenCVE AI on October 1, 2026 at 14:10 UTC.

Tracking

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Advisories

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History

Thu, 01 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
Description n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication.
Title n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub
First Time appeared N8n
N8n n8n
Weaknesses CWE-862
CPEs cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
Vendors & Products N8n
N8n n8n
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.5, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

N8n N8n
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T10:41:57.207Z

Reserved: 2026-09-30T10:52:32.249Z

Link: CVE-2026-103251

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-01T11:17:18.973

Modified: 2026-10-01T11:17:19.103

Link: CVE-2026-103251

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T14:45:09Z

Weaknesses